Same happened to me. Caught my ex cheating and she bailed for her highschool sweetheart. Is what it is. Thankfully we have shared 50/50 custody and we get along. I took the brunt of it but I made good decisions and took care of myself.
This YouTube channel should be mandatory for all men and boys
https://www.youtube.com/channel/UCuKqtwPO5ci5_KoZGbfl33g
I’m 39 and have been single two years. I have little to no interest in dating, especially the women my age. Most are either in the process of dumping their husbands for a bigger better deal, they are single craving children and have slept around for over a decade, or they are single moms with too much baggage and little to offer.
Never settle! Never. Work on yourself and be the best version of yourself you can build. Settling is only setting yourself up for failure later. Be realistic, but worry about YOU (and your kids) first.
Same basic place you are. Working on myself and my kids. My kids are 17 and 15. Trying to get the two 17’s into good vocational certificate programs. Once they are there I will be able to relax a little.